Impulse-pin for watches.



No. 804,739. PATENTED NOV. 14, 1905. B. KUHN.

IMPULSE PIN FOR WATCHES.

APPLICATION FILED MAY5, 1905.

WiTNESSES: INVENTOR WW FaWIOTZOZXA/ ITZ I BY ATTORNEY UNITED STATESiygrnnr OFFICE.

EDMOND KUHN, OF EAST ORANGE. NEIV JERSEY, ASSIGNOR TO ERNEST AND GUSTAVBUNZL, OF NEW YORK, N. Y.

IMPULSE-PIN FOR WATCHES.

Specification of Letters Patent.

Patented Nov. 14, 1905,

Application filed May 5,1905. Serial No. 259.017.

T0 at whmn it nta concern:

Be it known that I, EDMOND KUHN, a citizen of the United States,residing at East Or ange, in the county of Essex and State of NewJersey, have invented new and useful Improvements in Impulse-Pins forWatch- Movements, of which the following is a specification.

By means of this invention an impulse-pin for a watch movement orescapement can be readily and cheaply produced and applied and broughtinto required position.

This invention has been found serviceable in the manufacture of cheapwatches, but no limitation of the invention is to be implied thereby.

This invention is set forth in the following specification and claimsand illustrated in the annexed drawings, in which- Figure 1 shows a faceview of an escapement embodying this invention and overlying partshaving been removed or sectioned off to allow inspection. Fig. 2 is aface view of a balance-wheel with an impulse-pin blank on thewheel-shaft. Fig. 3 is a view like Fig. 2, the blank having been bent toform the impulse-pin. Fig. 4 is a section along 90 as, Fig. 3. Fig. 5 isa detail view of a blank.

An object of this invention is to construct an adjustable impulse-pin.

In cheap timepieces the distance between the lever and balance-wheel isliable to vary or be changed. Heretofore round pins or partly-flattenedpins have been used; but on account of their shortness these could notbe bent to match with or engage the lever in case it should be necessaryto obtain adjustment. To obtain an adjustable impulse-pin, a piece ofsheet metal is cut and punched to the form shown in Fig. 5 anddesignated by the letter a. This impulse-pin a, is staked to the shaftor staff of balance-wheel I), Fig. 2, and then bent at right angles, asshown in Fig. 3. Should the lever c be too far away, the impulse-pin canbe bent toward the lever, or if said lever is too close to the balancethe impulse-pin can be bent away or in opposite direction. The inventionis not confined to the specific shape of the pin shown, as an openingcould be made in the balance-wheel, and the pin being made of anydesired shape could be connected to the balance-wheel.

The blank shown in Fig. 5 is readily died or cut from a piece of pliablematerial or metal. It comprises an eye and a shank por tion, as seen.The eye is forced or pressed onto the shaft d of the balance-wheel, soas to remain in fixed position thereon. This eye or blank is seated orplaced directly on the shaft or over the balance-wheel without requiringany other connecting means, such as a sleeve or tube or the like.Cheapness is thus secured. The free end of the blank being bent from theflat condition, Fig. 2, so as to occupy an angle, Fig. 3, such free endportion will form an impulse-pin or engage the fork of theescapement-lever. This end portion can be bent to a right angle orproject vertically fromthe plane of the balance-wheel or more or lesstoward and from the shaft (Z, or even laterally, if required. In otherwords, this pin is universallyadjustable or bendable, as required forengagement by the fork or lever 0. By connecting the blank to the wheeltransversely to the wheel-spoke, as seen in Fig. 2, the free end oftheblank is exposed or will project so as to be readily grasped by aninstrument or bent to the required angle or twist.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination with a balanceshaft, a balance-wheel and anescapement-lever, of an impulse-pin constructed from pliable materialand having an eye at its inner extremity staked to the said shaft, andthe outer extremity bent at an angle and projected through thebalance-wheel for engagement with the escapement-lever.

2. The combination with a balance-shaft, a balance-wheel and anescapement-lever, of a pliable impulse-pin held by the balancewheel andhaving an outer extremity bent at an angle and projected through thesaid wheel for engagement with the lever.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EDMOND KUHN.

Witnesses GEORGE IIULsBERG, EDWARD WIEsNnn.

